clean up persistent flag

-t --token is a persistent global flag, which is required for `influx config create`, but not required for `influx config update`.

We need to display the real usage of the token, without bother other sub command

Start by locating the CLI handling for the persistent -t/--token flag and compare the `influx config create` and `influx config update` entry points. The change is done when the token requirement reflects its actual use for create without imposing it on update or other subcommands.

Written by the indexing model from the issue text.